Member for use in the production of convex metal sheets and method for processing the same



NOV. 24, 1931. PATERSQN 1,833,035

MEMBER FORUSE IN THE PRODUCTION OF couvEx METAL SHEETS AND METHOD FOR PROCESSING THE SAME Filed Jan. 18, 1929 amnion dbtoma;

Patented Nov. 24, 1931 UNITED STATES-- PATENT OFFICE ALEXANDER PATERSON, OF BUFFALO, NEW YORK MEMBER EOE USE IN THE PRODUCTION OE CONVEX METAL SHEETS AND METHOD FOR PROCESSING THE SAME Application filed January 18, 1929. Serial No. 333,420.

This invention relates to the art of rolling sheet metal and proposes an advantageous form of strip metal which is to be used in the production of final gauge sheet metal together with a novel method of processing the same.

It is Well known that the ultimate thinnessto which a single sheet or strip of metal can bereduced is limited by the various rolling factors and in order to reduce the sheets bethat the sheets or packs which are obtained from one source, differ in natural convexity, from those obtained from another source. Consequently for further rolling, it is necessary to design or adjust the rolls specially for as rolling the packs from one source and then to redesign or readjust the rolls for the packs from another source orto adapt each pack specially to fit the rolls.

This latter practice is fully disclosedin my companion application filed October 6, 1927 and serially numbered 224,343, in Which I propose to form various packs of sheet metal from various sources with a predetermined or standardized convexity. By so doing all such packs may be reduced on the same set of rolls without requiring any change in the design or adjustment of the rolls except insofar as a pack having a different standard of convexity or a standard pack of different thickness is to be reduced.

The present invention which is directed in a general way to packs having a standardized convexity, has, for its principal object, to provide a strip of sheet metal from which single sheets of standard convexity maybe directly obtained whereby the packs built up from such sheets will also be standardized.

A further object is to provide a simple,

rapid and effective methodof producing the strip from which the convex sheets are Obtained.

The invention consists informing a strip of sheet metal with depressions which extend across its width at specified intervals along its length. By transversely shearing the strip at the center of each depression, individual sheets of convex cross section are provided having a length determined by the Width of the strip, a Width determined by the distance between successive depressions and a convexitydetermined by the magnitude of the depression.

The invention is illustrated in the accomi panying drawings, wherein:

Figure l is a side elevation of a Schematic arrangement for depressing and shearing the strip, the magnitude of the depressions be-,

ing greatly exaggerated for the sake of clearness.

Figure 2 is a section along line 22 of Figure 1.

Figure 3 is a view in elevation showing the use of different means for effecting the depressions. V

Figure 4 is a fragmentary view of a strip formed with a groove in each depression to indicate the line along which the strip is to be cut.

In the practice of my invention, a hot or cold strip of metal is utilized, a cold strip being preferred which previously has been processed to the point where it is desirable or necessary to divide it into individual sheets for pack rolling. This strip which is indicated at 1, is thereupon passed through a pair of depressing rolls 2 each of which is similarly formed with raised cam surfaces 3. Obviously as the rolls rotate, the opposed cam surfaces 8 grip the strip with alternately increasing and decreasing forces so as to form it with a series of uniform depressions 4 and crests 5, the strip thereby having an undu-' lating longitudinal section. These depressions actually are so small as to be imperceptible to the eye but for the sake of clearness, they are greatly exaggerated in the drawings. The rolls 2 utilized will, of course be designed to form the depressions in the strip at determined intervals dependent upon the width of the convex sheet desired inasmuch as the distance between the centers of successive depressions determines the width of the sheets.

After the depressions are formed, the strip is transversely sheared through the center of hi order to facilitate the proper severance of the sheets, the cam surface of one or both rolls is preferably formed with a small rib (not shown) so located as to mark the strip across its width and through the center of each depression as indicated at 7 in Figure 4. It is apparent, of course, that the width of the strip determines the length of the sheet while the width of the sheet is controlled by the distance between depressions that is to say the distance between successive marks 7.

It is equally apparent that the formation of depressions in the manner described providesthe sheets with a convex cross section and since the depressions and crests are uniform the convexities of the various sheets will also be uniform. The sheets may, therefore, be piled or doubled to form packs which obviously will also be of uniform convexity. As a result the succeeding rolling operations of each pack may be performed on the same set of rolls without requiring a special adaptation of the rolls to each pack as set forth in my said application, Serial No. 222,343;

It will, of course, he understood that any suitable means may be utilized for the purpose of forming the strip with depressions, the rolls shown in Figure 1 merely being illustrative of one suitable mechanism. Another mechanism for this purpose is shown in, Figure 3. This mechanism consists of a pair of opposed hammers or dies 8 having a beveled str1p-engagmg surface 9. Thed1es S are operated at intervals to engage and form the strip with depressions of suitable-magnitude so as to provide the desired (ZODVGXltY.

The strip after leaving the dies will, of course, be sheared and processed as described in connect1on with Figure 1.

An advantageous feature of this method isthat it permits the final rolling operations to be performed at points other than the point of manufacture of the strip itself. Thus the strip may be processed tosheet formof standard convexity and then shippedto other points for the final rolling operationsor the unprocessed strip may be shipped to such points and there processed to sheets of finished gauge. The method also has the advantage of being quickly and easily performed with uniform accuracy and consequently less waste and lower cost.

Having fully described my invention, I claim:

1. The method of producing sheet metal packs in preparation for final rolling operations consistmg: in forming strip of meta with transverse depressions at intervals along its length, said intervals depending upon the width of the, sheets to, be produced, transversely shearing said strip through each depression to provide the sheets of convex cross section and manipulating said sheets into. pack form of convex cross section for further rolling.

2. 'l'he method of producing sheet metal packs prior to and in preparation for reduction by further rolling which consists in forming a strip of metal with transverse depressions at intervals along its length to provide sheets of predeternnned cross-sectional curvatures and cross-sect.onal areas and forming a pack from a plurality of said sheets, thereby to provide a pack which will conform as to area andoutline to a predetermined standard for which the mil-l which is to elfect the further reduction is given a predetermined adjustment.

3. The method of producing sheet metalpa-cks priorto and in preparatlonfor reduction by further rolhng; which consists in forn'iing a strip of metal with trai'lsverse depressions at determined intervals along its length to provide sheets of predetermined cross-sectional curvatures and cross-sectionalareas, said intervals depending upon the width of the convex sheets tobe produced and forming a pack from a plurality of said sheets, thereby to provide a pack which will conform to: a predetermined standard for which the mill which is to. elfect the further reduction is given a predetermined. adjust.- ment.

4.. The method of producing sheet, metal packs prior to, and in preparation for reduction by further'rolling whichconsistsin forming a strip of metal with transverse depressions at intervals along its length to provide sheets of predeterminedcross-sectional curvatures and cross-sectional areas, transversely shearing said strip at said depressions and. forming a pack from a plurality of said sheets, thereby to provide a pack which will conform as teams and outline to a predetermined standard for which the mill which is to efiect the furtherreduction isgivcn apre determined adjustment.

5. The method of producing sheet metal packs prior to and in preparation for reductionby further rolling which consists. in forming a strip with uniform depressions throughout its width and at determined intervals along its length to provide sheets of predetermined cross-sectional curvatures and cross-sectional areas, said intervals depending upon the Width of the convex sheets to be produced, transversel shearing said strip at said depressions an formin a pack from a plurality of said sheets, there y to provide a pack which Will conform as to area and outline to a predetermined standard for which the mill which is to effect the further reduction is given a predetermined adjustment.

6. A sheet metal pack composed of at least two sheets, each of said sheets being formed with a predetermined cross-sectional curvature and cross-sectional area, whereby the said pack conforms as to area and outline to a predetermined standard for which the mill which is to effect the reduction is given a predetermined adjustment.

In testimony whereof I hereby aflix my signature.

ALEXANDER PATERSON. 

